People with OCD do not want to purposely hurt anyone, of course, some do have obsessions about hurting others, but that does not mean that they want to hurt anyone.
In fact, it is most often just the opposite; they want to do all that they can to be sure that they bring no harm to anyone. However, there are times that the OCD behavior becomes so overwhelming that they do something they know to be logically wrong.
For example, families of an individual with OCD can experience great emotional burdens. They may get into arguments about rituals or may become very sad at watching their loved one do things that do not seem at all logical.
Also, by doing their rituals, individuals with OCD may inadvertently harm someone. If a person with OCD is afraid of germs and is watching a child, that person may refuse to change a diaper or help a child clean him or herself, which may lead to a rash or infection.
This chance of accidentally harming another person is yet another compelling reason to seek treatment for OCD.